xref: /openbmc/qemu/hw/ipmi/isa_ipmi_bt.c (revision 907b5105)
1 /*
2  * QEMU ISA IPMI BT emulation
3  *
4  * Copyright (c) 2015 Corey Minyard, MontaVista Software, LLC
5  *
6  * Permission is hereby granted, free of charge, to any person obtaining a copy
7  * of this software and associated documentation files (the "Software"), to deal
8  * in the Software without restriction, including without limitation the rights
9  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10  * copies of the Software, and to permit persons to whom the Software is
11  * furnished to do so, subject to the following conditions:
12  *
13  * The above copyright notice and this permission notice shall be included in
14  * all copies or substantial portions of the Software.
15  *
16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
22  * THE SOFTWARE.
23  */
24 
25 #include "qemu/osdep.h"
26 #include "qemu/module.h"
27 #include "qapi/error.h"
28 #include "hw/irq.h"
29 #include "hw/ipmi/ipmi_bt.h"
30 #include "hw/isa/isa.h"
31 #include "hw/qdev-properties.h"
32 #include "migration/vmstate.h"
33 #include "qom/object.h"
34 
35 #define TYPE_ISA_IPMI_BT "isa-ipmi-bt"
36 OBJECT_DECLARE_SIMPLE_TYPE(ISAIPMIBTDevice, ISA_IPMI_BT)
37 
38 struct ISAIPMIBTDevice {
39     ISADevice dev;
40     int32_t isairq;
41     qemu_irq irq;
42     IPMIBT bt;
43     uint32_t uuid;
44 };
45 
46 static void isa_ipmi_bt_get_fwinfo(struct IPMIInterface *ii, IPMIFwInfo *info)
47 {
48     ISAIPMIBTDevice *iib = ISA_IPMI_BT(ii);
49 
50     ipmi_bt_get_fwinfo(&iib->bt, info);
51     info->interrupt_number = iib->isairq;
52     info->i2c_slave_address = iib->bt.bmc->slave_addr;
53     info->uuid = iib->uuid;
54 }
55 
56 static void isa_ipmi_bt_raise_irq(IPMIBT *ib)
57 {
58     ISAIPMIBTDevice *iib = ib->opaque;
59 
60     qemu_irq_raise(iib->irq);
61 }
62 
63 static void isa_ipmi_bt_lower_irq(IPMIBT *ib)
64 {
65     ISAIPMIBTDevice *iib = ib->opaque;
66 
67     qemu_irq_lower(iib->irq);
68 }
69 
70 static void isa_ipmi_bt_realize(DeviceState *dev, Error **errp)
71 {
72     Error *err = NULL;
73     ISADevice *isadev = ISA_DEVICE(dev);
74     ISAIPMIBTDevice *iib = ISA_IPMI_BT(dev);
75     IPMIInterface *ii = IPMI_INTERFACE(dev);
76     IPMIInterfaceClass *iic = IPMI_INTERFACE_GET_CLASS(ii);
77 
78     if (!iib->bt.bmc) {
79         error_setg(errp, "IPMI device requires a bmc attribute to be set");
80         return;
81     }
82 
83     iib->uuid = ipmi_next_uuid();
84 
85     iib->bt.bmc->intf = ii;
86     iib->bt.opaque = iib;
87 
88     iic->init(ii, 0, &err);
89     if (err) {
90         error_propagate(errp, err);
91         return;
92     }
93 
94     if (iib->isairq > 0) {
95         iib->irq = isa_get_irq(isadev, iib->isairq);
96         iib->bt.use_irq = 1;
97         iib->bt.raise_irq = isa_ipmi_bt_raise_irq;
98         iib->bt.lower_irq = isa_ipmi_bt_lower_irq;
99     }
100 
101     qdev_set_legacy_instance_id(dev, iib->bt.io_base, iib->bt.io_length);
102 
103     isa_register_ioport(isadev, &iib->bt.io, iib->bt.io_base);
104 }
105 
106 static const VMStateDescription vmstate_ISAIPMIBTDevice = {
107     .name = TYPE_IPMI_INTERFACE_PREFIX "isa-bt",
108     .version_id = 2,
109     .minimum_version_id = 2,
110     /*
111      * Version 1 had messed up the array transfer, it's not even usable
112      * because it used VMSTATE_VBUFFER_UINT32, but it did not transfer
113      * the buffer length, so random things would happen.
114      */
115     .fields      = (VMStateField[]) {
116         VMSTATE_STRUCT(bt, ISAIPMIBTDevice, 1, vmstate_IPMIBT, IPMIBT),
117         VMSTATE_END_OF_LIST()
118     }
119 };
120 
121 static void isa_ipmi_bt_init(Object *obj)
122 {
123     ISAIPMIBTDevice *iib = ISA_IPMI_BT(obj);
124 
125     ipmi_bmc_find_and_link(obj, (Object **) &iib->bt.bmc);
126 
127     vmstate_register(NULL, 0, &vmstate_ISAIPMIBTDevice, iib);
128 }
129 
130 static void *isa_ipmi_bt_get_backend_data(IPMIInterface *ii)
131 {
132     ISAIPMIBTDevice *iib = ISA_IPMI_BT(ii);
133 
134     return &iib->bt;
135 }
136 
137 static Property ipmi_isa_properties[] = {
138     DEFINE_PROP_UINT32("ioport", ISAIPMIBTDevice, bt.io_base,  0xe4),
139     DEFINE_PROP_INT32("irq",   ISAIPMIBTDevice, isairq,  5),
140     DEFINE_PROP_END_OF_LIST(),
141 };
142 
143 static void isa_ipmi_bt_class_init(ObjectClass *oc, void *data)
144 {
145     DeviceClass *dc = DEVICE_CLASS(oc);
146     IPMIInterfaceClass *iic = IPMI_INTERFACE_CLASS(oc);
147 
148     dc->realize = isa_ipmi_bt_realize;
149     device_class_set_props(dc, ipmi_isa_properties);
150 
151     iic->get_backend_data = isa_ipmi_bt_get_backend_data;
152     ipmi_bt_class_init(iic);
153     iic->get_fwinfo = isa_ipmi_bt_get_fwinfo;
154 }
155 
156 static const TypeInfo isa_ipmi_bt_info = {
157     .name          = TYPE_ISA_IPMI_BT,
158     .parent        = TYPE_ISA_DEVICE,
159     .instance_size = sizeof(ISAIPMIBTDevice),
160     .instance_init = isa_ipmi_bt_init,
161     .class_init    = isa_ipmi_bt_class_init,
162     .interfaces = (InterfaceInfo[]) {
163         { TYPE_IPMI_INTERFACE },
164         { }
165     }
166 };
167 
168 static void ipmi_register_types(void)
169 {
170     type_register_static(&isa_ipmi_bt_info);
171 }
172 
173 type_init(ipmi_register_types)
174